relationship

问题 I have two separate csv files that I need to import into my neo4j database. The first file contains all the nodes that I wish to import. The information is classified as follows: id, Name 1, Earth science To import it, I successfully used the following code: LOAD CSV WITH HEADERS FROM 'file:///Node_test.csv' AS line CREATE (:Discipline { id: toInt(line.id), name: line.Name}) Now, I want to import my relationship file and create all the relationship between the nodes I just imported. The

问题 I have this situation: I have two CoreData entities: MUSIC_ACTIVITY is an ABSTRACT CoreData entity; LOCATION : with some attributes as: city, address,... BAR : with some attributes; PUB : with some attributes; in MUSIC_ACTIVITY I have a relationship with LOCATION (1to1). MUSIC_ACTIVITY is the PARENT entity of BAR ; MUSIC_ACTIVITY is the PARENT entity of PUB ; I generate automatically class of this model.. So: In MUSIC_ACTIVITY I have one property LOCATION In LOCATION I have property MUSIC

问题 Searching about the cascading behavior of Entity Framework , if noticed this answer. On short, the OP is searching for a way to perform cascade delete on 1-0 / 1-1 relationships in Entity Framework , and the best answer contains a snippet on Fluent API applying WillCascadeOnDelete(true); On the DB Context's modelBuilder. On the selected answer, a user (CodeMonkey) mentioned: (...) Some have suggested [Required] for cascading delete. This indeed works, but of course, only if it is actually

问题 I have found a critical bug with relationships. I try to set relationship for my SMUserManagedObject after saving in the block "saveOnSuccess" and have a crash with a log: * Terminating app due to uncaught exception 'SMExceptionIncompatibleObject', reason: 'No Attribute found for entity User which maps to the primary key on StackMob. The Attribute name should match one of the following formats: lowercasedEntityNameId or lowercasedEntityName_id. If the managed object subclass for User inherits

问题 I am now learning to work with pivot tables: https://laravel.com/docs/4.2/eloquent#working-with-pivot-tables I have WeeklyRoutine model. Each routine has several Activities. The assigned activities are attached in a pivot table activity_routine . Relation defined in the WeeklyRoutine model: return $this->belongsToMany('App\Models\Activity', 'activity_routine', 'routine_id', 'activity_id')->withPivot('done_at')->withTimestamps(); } it looks like this: // activity_routine pivot table (relevant

问题 I am using from architect component and I need to set a lot of query on bellow values. How to create relation between bellow entities for query ? in normal mode I can't access to nested objects. For example I need to @Query("SELECT * FROM Content Where parent_id = 100") and other queries or I need to values that the name is JIM... but in normal mode I can't access to nested objects. @Entity(tableName = "tblCourseContentList") public class CourseContentListModel { @PrimaryKey(autoGenerate =

问题 I have received some excellent information on Parse promises so far and am ready to soak up the next bit of the puzzle to me... relations of relations. The following code is in most part in answering Issues with Parse Cloud Code Promises but I have in the comments of the sections piece of code my next question. How would I go about further querying of relations within the top level relations? would be great to see how you would extend you code to do that @roamer-1888 Latest: //Return a single

问题 I'm using Spring Data Neo4j 4.0.0 with Neo4j 2.2.1 and I'm trying to create a relationship between two nodes with the exact same labels. So, I have a NodeEntity class and I have a variable inside with the same Type as the class itself, and annotate it as Relationship. But, when I save the object to the database using the save() method of the repository object, the relationship can't be created. Thank you in advance and your suggestion would be really appreciated! EDIT Here is the node entity

问题 I'm trying to determine the best approach for the following scenario using Parse and a Backbone front end. I want to build a discussion thread where two or more users, of various roles (ie: member, admin, etc), are able to communicate by posting simple messages which will appear in a chronological list. The messages would appear with the users name, users photo, the date it was posted and the message content. My initial instinct was to create a Message class in Parse with the following fields

问题 I have three tables: tbl_profiles tbl_options tbl_profileOption with many-to-many relationship what the insert trigger on tbl_options I have to use to add the new options to each profile on tbl_profiles , by default value of isChoose is 0 and on the opposite side when insert a new profile binding it with all options on tbl_options In other words : If I add new Option (4....E) to tbl_option , the trigger must be insert two new rows on tbl_profileOption : 1....4.......0 2....4.......0 I hope